CN201036227Y - Permanent-magnet AC contactor - Google Patents
Permanent-magnet AC contactor Download PDFInfo
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- CN201036227Y CN201036227Y CNU2007200931742U CN200720093174U CN201036227Y CN 201036227 Y CN201036227 Y CN 201036227Y CN U2007200931742 U CNU2007200931742 U CN U2007200931742U CN 200720093174 U CN200720093174 U CN 200720093174U CN 201036227 Y CN201036227 Y CN 201036227Y
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Abstract
A permanent-magnet alternating-current contactor comprises a U-shaped static iron core and an excitation coil arranged in the U-shaped static iron core. The wiring terminal of the excitation coil connects electrically with a controller via a wire; the upper end of the excitation coil is provided with a tripping spring, which bears a T-shaped movable iron core that can be inhaled by the excitation coil; an Nd-Fe-B permanent magnet is fixed in the U-shaped static iron core; the lower part of the T-shaped movable iron core is opposite to the Nd-Fe-B permanent magnet. The utility model is characterized in that two sides of the U-shaped static iron core are provided with two rubber springs; the control circuit has a rectification circuit, a tripping circuit and an excitation coil in sequential parallel connection; a tripping and a switching voltage control circuits are connected between the output end of the rectification circuit and the input end of the tripping circuit. The technology reduces the impact vibration in switching via the rubber spring, thereby lengthening the useful life of the product; and improving the accuracy and reliability of the contactor in tripping and switching actions through the tripping and the switching voltage control circuits arranged in the circuit, and improving the product performance.
Description
Technical field
The utility model relates to a kind of A.C. contactor, particularly relates to a kind of permanent-magnetic AC contact.
Background technology
The present electromagnetic AC contactor that uses, behind combined floodgate, magnet exciting coil also needs certain holding current, and not only the phenomenon that magnet exciting coil burns because of heating also often takes place in consumed power.Though existing permanent-magnetic AC contact has overcome the above-mentioned shortcoming of electromagnetic AC contactor, electromagnet does not have glissando, during combined floodgate vibrations big, shortened contactor useful life; Control circuit does not have switching voltage restriction or does not have the separating brake voltage limit, makes branch, feed motion inaccurate, even can not automatic brake separating during under-voltage, dead electricity, has a strong impact on the power consumption equipment safe operation.
Summary of the invention
The purpose of this utility model provides a kind of permanent-magnetic AC contact, impact shock when present technique can alleviate the contactor combined floodgate by vibration-proof structure, prolong the useful life of contactor, by minute, switching voltage control can make contactor branch, feed motion accurately and reliably, thereby guarantee the power consumption equipment safe operation.
The technical solution of the utility model is: a kind of permanent-magnetic AC contact, comprise the U-shaped fixed core, be contained in the magnet exciting coil in the U-shaped fixed core, the binding post of magnet exciting coil is electrically connected with controller by lead, in the magnet exciting coil upper end tripping spring is housed, one of this spring-loaded can be moving unshakable in one's determination by the T shape that magnet exciting coil sucks, and installs Nd-Fe-B permanent magnet in the U-shaped fixed core, the moving bottom unshakable in one's determination of T shape is relative with Nd-Fe-B permanent magnet, and it is characterized in that: rubber spring is equipped with in U-shaped fixed core both sides.
Described controller is characterized in that: have successively the rectification circuit, separating brake circuit, the magnet exciting coil that are electrically connected, be connected to branch, switching voltage control circuit between the input of the output of rectification circuit and separating brake circuit.
The divide-shut brake voltage control circuit of present technique is by voltage-stabiliser tube D5-D7, diode D8, capacitor C 2-C5, resistance R 1-R8, triode Q1, controllable silicon Q2, Q3, form with field effect transistor Q4, voltage-stabiliser tube D5, the D7 negative pole, resistance R 8 one ends connect rectification circuit (8) output head anode respectively, capacitor C 2, C3, C5 one end, resistance R 2, R3 one end, triode Q1 emitter, controllable silicon Q2 negative electrode, voltage-stabiliser tube D6 positive pole, capacitor C 4 negative poles, field effect transistor Q4 source electrode connects rectification circuit (8) negative pole of output end respectively, the anodal connecting resistance R1 of voltage-stabiliser tube D5, resistance R 1, the other end of R2 and capacitor C 2 connects the base stage of triode Q1 respectively, resistance R 3 other ends, controllable silicon Q2 controls the utmost point, resistance R 4 one ends connect the collector electrode of triode Q1 respectively, resistance R 7 one ends, resistance R 4 other ends, controllable silicon Q2 anode, controllable silicon Q3 negative electrode, capacitor C 4 positive poles and voltage-stabiliser tube D6 negative pole connect the grid of field effect transistor Q4 respectively, the anodal connecting resistance R5 of voltage-stabiliser tube D7, resistance R 5 other ends, resistance R 6 one ends connect the other end of capacitor C 3 respectively, the resistance R 6 and the R7 other end connect the controllable silicon Q3 control utmost point respectively, controllable silicon Q3 anode, capacitor C 5 other ends connect diode D8 negative pole respectively, resistance R 8 another terminating diode D8 positive poles.
Because technique scheme is in controller circuitry, added the divide-shut brake voltage control circuit, contactor is accurately closed a floodgate when being higher than switching voltage, automatic brake separating when being lower than separating brake voltage or dead electricity, move safe and reliable, thereby improved the contactor quality, and under critical condition divide-shut brake friction phenomenon, again because two rubber springs have been installed in the both sides of U-shaped fixed core, it can alleviate the impact shock when closing a floodgate, reduce contact secondary knock-on, so present technique is by improving damping property, can prolongs contactor useful life.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the utility model permanent-magnetic AC contact electromagnet structure schematic diagram.
Fig. 2 is the A-A profile of Fig. 1.
Fig. 3 is the circuit diagram of the utility model permanent-magnetic AC contact.
1 moving iron core among the figure, 2 tripping springs, 3 magnet exciting coils, 4 fixed cores, 5 permanent magnets, 6 rubber springs, 7 controllers, 8 rectification circuits, 9 minutes, switching voltage control circuit, 10 separating brake circuit.
Embodiment
The U-shaped fixed core (4) of permanent-magnetic AC contact is packed on the contactor base plate by rubber spring, in the middle of U-shaped fixed core (4), install a Nd-Fe-B permanent magnet (5), magnet exciting coil (3) is installed in the U-shaped fixed core, the binding post of magnet exciting coil (3) is electrically connected with controller (7) by lead, magnet exciting coil (3) upper end is equipped with a tripping spring (2), one of tripping spring (2) supporting can be by the T shape that magnet exciting coil (3) sucks moving (1) unshakable in one's determination, in the both sides of U-shaped fixed core (4) rubber spring (6) is housed, it can alleviate the impact shock when closing a floodgate, reduce contact secondary knock-on, prolong contactor useful life.The structure of present technique circuit part is electrically connected successively by rectification circuit (8), divide-shut brake voltage control circuit (9), separating brake circuit (10) to be formed.Rectification circuit (8) input is connected with AC power, and the output of separating brake circuit (10) is connected with magnet exciting coil (3).
Rectification circuit (8): constitute bridge rectifier by 4 rectifier diode D1-D4, AC1, AC2 are ac power input end, and capacitor C 1 is parallel between AC1, AC2, is used to absorb impulse disturbances.
Divide-shut brake voltage control circuit (9): by voltage-stabiliser tube D5-D7, diode D8, capacitor C 2-C5, resistance R 1-R8, triode Q1, controllable silicon Q2, Q3, form with field effect transistor Q4, voltage-stabiliser tube D5, the D7 negative pole, resistance R 8 one ends connect rectification circuit (8) output head anode respectively, capacitor C 2, C3, C5 one end, resistance R 2, R3 one end, triode Q1 emitter, controllable silicon Q2 negative electrode, voltage-stabiliser tube D6 positive pole, capacitor C 4 negative poles, field effect transistor Q4 source electrode connects rectification circuit (8) negative pole of output end respectively, the anodal connecting resistance R1 of voltage-stabiliser tube D5, resistance R 1, the other end of R2 and capacitor C 2 connects the base stage of triode Q1 respectively, resistance R 3 other ends, controllable silicon Q2 controls the utmost point, resistance R 4 one ends connect the collector electrode of triode Q1 respectively, resistance R 7 one ends, resistance R 4 other ends, controllable silicon Q2 anode, controllable silicon Q3 negative electrode, capacitor C 4 positive poles and voltage-stabiliser tube D6 negative pole connect the Gate utmost point of field effect transistor Q4 respectively, the anodal connecting resistance R5 of voltage-stabiliser tube D7, resistance R 5 other ends, resistance R 6 one ends connect the other end of capacitor C 3 respectively, the resistance R 6 and the R7 other end connect the controllable silicon Q3 control utmost point respectively, controllable silicon Q3 anode, capacitor C 5 other ends connect diode D8 negative pole respectively, resistance R 8 another terminating diode D8 positive poles.
Separating brake circuit (10): form by triode Q5, field effect transistor Q6, voltage-stabiliser tube D9, diode D10, capacitor C 6, C7, C8, resistance R 9-R13, piezo-resistance R14.Resistance R 9 one ends, diode D10 positive pole connect rectification circuit (8) output head anode, capacitor C 6, resistance R 11, capacitor C 7 one ends, triode Q5 emitter, voltage-stabiliser tube D9 positive pole, capacitor C 8 negative poles connect field effect transistor Q6 source electrode respectively, resistance R 9, capacitor C 6 other end connecting resistance R10, resistance R 10 another termination triode Q5 base stages, R11 is connected in parallel between triode Q5 base stage, emitter.Triode Q5 collector electrode, voltage-stabiliser tube D9 negative pole, capacitor C 7 other ends and the resistance R 12 1 termination field effect transistor Q6 Gate utmost points, another termination capacitor C 8 positive poles of R12.Field effect transistor Q6 drain electrode is connected piezo-resistance R14 one terminating diode D10 negative pole, another termination capacitor C 8 positive poles by resistance R 13 with diode D10 negative pole.Magnet exciting coil (3) one terminating diode D10 negative poles, another termination capacitor C 8 positive poles.Field effect transistor Q6 source electrode connects field effect transistor Q4 drain electrode in the divide-shut brake voltage control circuit (9).
The permanent magnet AC contactor course of work and principle: permanent magnet AC contactor separating brake voltage is set at 110V, switching voltage is set at 175V, when alternating current passes through AC1, when AC2 terminal and control circuit connection and voltage are higher than 110V, voltage-stabiliser tube D5 at first punctures conducting, triode Q1 conducting, controllable silicon Q2 ends, if supply voltage is higher than 175V afterwards, voltage-stabiliser tube D7 punctures, and controllable silicon Q3 is triggered and conducting, and field effect transistor Q4 grid voltage is far above its cut-in voltage this moment, the field effect transistor conducting, DC power supply is through diode D10, magnet exciting coil (3) is to capacitor C 8 chargings, and the magnetic direction that this charging current is produced in magnet exciting coil (3) is identical with middle Nd-Fe-B permanent magnet (5) magnetic direction that installs of U-shaped fixed core (4), electromagnetic force and the stack of permanent magnetism power, greater than spring force, to move iron core (1) and inhale, be held, after capacitor C 8 chargings finish by permanent magnet (5) to fixed core (4), magnet exciting coil no current passes through, magnetic field disappears, and is still held by permanent magnet (5) but move iron core, can not return.Contactor is realized closing a floodgate.Because U-shaped fixed core (4) is fixed on permanent-magnetic AC contact bottom body or the base plate by rubber spring (6), during combined floodgate, the impact shock during significantly light the combined floodgate has reduced the contact secondary and has bounced, and has prolonged contactor useful life.Filter capacitor C5 has reduced controllable silicon Q3 anode direct voltage ripple coefficient, controllable silicon Q3 in a single day, mains fluctuations can not exert an influence to controllable silicon Q3 conducting, capacitor C 5 has guaranteed further that also field effect transistor Q4 has more stable control voltage simultaneously, makes field effect transistor Q4 interrupted conducting phenomenon can not occur.Even at critical condition closing contactor also atremia phenomenon.
Behind the combined floodgate, when supply voltage is lower than the separating brake voltage of setting or dead electricity, voltage-stabiliser tube D5 ends, triode Q1 base current is cut off, triode Q1 ends, controllable silicon Q2 conducting, field effect transistor Q4 grid voltage is by controllable silicon Q2 short circuit, and field effect transistor Q4 ends, and triode Q5 does not have base current in the separating brake circuit (10), triode Q5 ends, field effect transistor Q6 grid voltage raises, field effect transistor Q6 conducting, and capacitor C 8 is by magnet exciting coil (3), resistance R 13, field effect transistor Q6 discharge, because of the charging current direction of discharging current direction when closing a floodgate opposite, so the magnetic direction that magnet exciting coil (3) produces is opposite with the permanent magnet magnetic field direction, at this moment, the repulsion between permanent magnet (5) and T shape moving (1) unshakable in one's determination adds the elastic force of upper spring, make (1) fast return unshakable in one's determination, contactor is realized separating brake.Because controllable silicon Q2 can not end before realizing separating brake, interrupted conducting phenomenon just can not appear in field effect transistor Q4 yet.Even at critical condition separating brake contactor also atremia phenomenon.
End before controllable silicon Q3 conducting in order to ensure controllable silicon Q2, the D5 puncture voltage is lower than the D7 puncture voltage.
Claims (3)
1. permanent-magnetic AC contact, comprise U-shaped fixed core (4), be contained in the magnet exciting coil (3) in the U-shaped fixed core (4), the binding post of magnet exciting coil (3) is electrically connected with controller (7) by lead, in magnet exciting coil (3) upper end tripping spring (2) is housed, one of this spring (2) supporting can be by the T shape that magnet exciting coil (3) sucks moving (1) unshakable in one's determination, install Nd-Fe-B permanent magnet (5) in the U-shaped fixed core (4), moving (1) bottom unshakable in one's determination of T shape is relative with Nd-Fe-B permanent magnet (5), and it is characterized in that: U-shaped fixed core (4) both sides are equipped with rubber spring (6).
2. a kind of permanent-magnetic AC contact according to claim 1, it is characterized in that: described controller (7), have successively the rectification circuit (8), separating brake circuit (10), the magnet exciting coil (3) that are electrically connected, between the input of the output of rectification circuit (8) and separating brake circuit (10), be connected to branch, switching voltage control circuit (9).
3. a kind of permanent-magnetic AC contact according to claim 2, it is characterized in that: divide, the switching voltage control circuit is by voltage-stabiliser tube (D5-D7), diode (D8), electric capacity (C2-C5), resistance (R1-R8), triode (Q1), controllable silicon (Q2), (Q3), and field effect transistor (Q4) is formed, voltage-stabiliser tube (D5), (D7) negative pole, resistance (R8) end connects rectification circuit (8) output head anode respectively, electric capacity (C2), (C3), (C5) end, resistance (R2), (R3) end, triode (Q1) emitter, controllable silicon (Q2) negative electrode, voltage-stabiliser tube (D6) positive pole, electric capacity (C4) negative pole, field effect transistor (Q4) source electrode connects rectification circuit (8) negative pole of output end respectively, the anodal connecting resistance R1 of voltage-stabiliser tube (D5), resistance (R1), (R2) and the other end of electric capacity (C2) connect the base stage of triode (Q1) respectively, resistance (R3) other end, controllable silicon (Q2) the control utmost point, resistance (R4) end connects the collector electrode of triode (Q1) respectively, resistance (R7) end, resistance (R4) other end, controllable silicon (Q2) anode, controllable silicon (Q3) negative electrode, electric capacity (C4) positive pole and voltage-stabiliser tube (D6) negative pole connect the grid of field effect transistor (Q4) respectively, the anodal connecting resistance of voltage-stabiliser tube (D7) (R5), resistance (R5) other end, resistance (R6) end connects the other end of electric capacity (C3) respectively, resistance (R6) and (R7) other end connect controllable silicon (Q3) the control utmost point respectively, controllable silicon (Q3) anode, electric capacity (C5) other end connects diode (D8) negative pole respectively, another terminating diode of resistance (R8) (D8) positive pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200931742U CN201036227Y (en) | 2007-01-15 | 2007-01-15 | Permanent-magnet AC contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200931742U CN201036227Y (en) | 2007-01-15 | 2007-01-15 | Permanent-magnet AC contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201036227Y true CN201036227Y (en) | 2008-03-12 |
Family
ID=39197116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200931742U Expired - Fee Related CN201036227Y (en) | 2007-01-15 | 2007-01-15 | Permanent-magnet AC contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201036227Y (en) |
-
2007
- 2007-01-15 CN CNU2007200931742U patent/CN201036227Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080312 |